JPS6478100A - Speaker - Google Patents

Speaker

Info

Publication number
JPS6478100A
JPS6478100A JP62235162A JP23516287A JPS6478100A JP S6478100 A JPS6478100 A JP S6478100A JP 62235162 A JP62235162 A JP 62235162A JP 23516287 A JP23516287 A JP 23516287A JP S6478100 A JPS6478100 A JP S6478100A
Authority
JP
Japan
Prior art keywords
superconductive
electromagnet
current
coil
speaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62235162A
Other languages
Japanese (ja)
Inventor
Koji Matsushima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62235162A priority Critical patent/JPS6478100A/en
Publication of JPS6478100A publication Critical patent/JPS6478100A/en
Pending legal-status Critical Current

Links

Landscapes

  • Superconductor Devices And Manufacturing Methods Thereof (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

PURPOSE:To freely set the characteristics of a speaker by providing an electromagnetic exciting means with a superconductive wire coil and a means to apply a superconductive current to a superconductive wire coil. CONSTITUTION:The current is applied to a coil 1-10 for an electromagnet composed of superconductive wires, a control signal is added to a switch control signal supplying terminal 1-13 after a fixed time, and a switch 1-11 is made fall on the side of a B. In such a condition, the superconductive current is applied to the coil 1-10 for the electromagnet, and after the supplying power source of a current supplying terminal 1-12 for the electromagnet is cut off, the constant current flows into the coil 1-10 for the electromagnet. Consequently, when the superconductive current is arbitrarily set, the intensity of the electromagnet can be set to the strong one, in which the characteristics of the superconductive wire is utilized, the suitable one and the weak one. Thus, the characteristics of the speaker can be arbitrarily set.
JP62235162A 1987-09-18 1987-09-18 Speaker Pending JPS6478100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62235162A JPS6478100A (en) 1987-09-18 1987-09-18 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62235162A JPS6478100A (en) 1987-09-18 1987-09-18 Speaker

Publications (1)

Publication Number Publication Date
JPS6478100A true JPS6478100A (en) 1989-03-23

Family

ID=16981972

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62235162A Pending JPS6478100A (en) 1987-09-18 1987-09-18 Speaker

Country Status (1)

Country Link
JP (1) JPS6478100A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346500A (en) * 1989-07-14 1991-02-27 Sony Corp Electroacoustic transducer
JPH0346499A (en) * 1989-07-14 1991-02-27 Sony Corp Electroacoustic transducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346500A (en) * 1989-07-14 1991-02-27 Sony Corp Electroacoustic transducer
JPH0346499A (en) * 1989-07-14 1991-02-27 Sony Corp Electroacoustic transducer

Similar Documents

Publication Publication Date Title
ES8206055A1 (en) Current detector.
JPS6478100A (en) Speaker
ES8203178A1 (en) Control means for electrical braking of a direct current motor.
JPS5241788A (en) Automatic wire tension control device in remote control device
JPS5764193A (en) Control system of electric power source for audio output device
ES254971U (en) Audible warning device for motor vehicles
JPS5645005A (en) Electromagnetic device
GB1046163A (en) Lifting electromagnet assembly
JPS5615927A (en) Electrospark machining device
JPS5398795A (en) Exciting method for superconduction magnet
JPS56133992A (en) Braking device for synchronous machine
JPS51127443A (en) Circuit for controlling current supply to load
JPS52149743A (en) Elevator starting control device
JPS545198A (en) Arc stabilizing source device
JPS567583A (en) Remote control system
JPS5357462A (en) Circuit for control of electric current in plunger solenoid coil
JPS54113828A (en) Small current transformer
JPS5261442A (en) Driving system of magnetic memory device
JPS5367975A (en) Device for detecting breakage of lamp
JPS6441135A (en) Electromagnetic relay
JPS54721A (en) Constant output controller for motor
JPS5719820A (en) Electromagnetic solenoid driving circuit
JPS5653599A (en) Ac generator excitation adjusting device
JPS5731384A (en) Motor driving circuit for electric motor vehicle
JPS56144659A (en) Terminal controller